You control a normal wah yourself, an auto wah has certain parameters that it goes by.

Normal wahs are generally better.
Tears in waves, minds on fire
Nights alone by your side
They both have their different uses, an autowah wah's by itself, usually depending on pick attack or something, and a normal wah you do yourself, and usually more useful.
"Breathe, breathe in the air
Don't be afraid to care"

Fender Strat/Tokai LS80>few pedals>Orange Rocker 30
yea, am auto-wah is like an envelope filter where the "wahness" is determined by the pick attack. A normal wah pedal relies on you moving the pedal to get the sweep, and they also sound slightly different
Autowahs tend to suck.
Wahs tend to do what you want, when you want, becuase you're actually controlling them.
Auto wahs are awesome for funk, just because they can do that shimmery, shaking wah sound, which is pretty hard to do with your foot.